Malicious PDF — malware analysis report

Static analysis result for SHA-256 656599580ab9d952…

MALICIOUS

PDF

34.5 KB Created: 2021-07-01 22:55:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 6c43c3639d38d190054c546eaa96d532 SHA-1: e243bc97cef0e31f498557b88e16150dd49d43d7 SHA-256: 656599580ab9d952777eb8b3e2539cdfb6ff418ed9dc254aac5d6f7accd4f3f8
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, with a primary focus on 'game hacks' and 'free generators' for popular games like Roblox and Minecraft. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' strongly indicates this is a social engineering tactic to trick users into visiting potentially malicious sites. While no scripts were explicitly extracted, the embedded URLs suggest a phishing or malware distribution attempt, likely initiated via a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://netcdn.co/app/431946152/counter-blox-roblox-offensive-hacks-2021-game-hack PDF link annotation
    • http://www.ocic.hr/files/how-do-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://www.ocic.hr/files/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.ocic.hr/files/roblox-april-fools-hack-roblox-blog-post_GM431946152.pdfIn PDF document text
    • https://www.ocic.hr/files/coin-master-codes_GM406889139.pdfIn PDF document text
    • https://www.ocic.hr/files/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • https://www.ocic.hr/files/free-minecraft-accounts-2021_GM479516143.pdfIn PDF document text
    • http://www.ocic.hr/files/best-anime-roblox-t-shirt-free_GM431946152.pdfIn PDF document text
    • https://www.ocic.hr/files/roblox-trolling_GM431946152.pdfIn PDF document text
    • http://www.ocic.hr/files/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • http://www.ocic.hr/files/how-do-you-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • https://www.ocic.hr/files/password-free-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://www.ocic.hr/files/free-robux-only-1-step_GM431946152.pdfIn PDF document text
    • http://www.ocic.hr/files/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.ocic.hr/files/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.ocic.hr/files/coin-master-34-4-free-download_GM406889139.pdfIn PDF document text
    • http://www.ocic.hr/files/how-to-hack-into-accounts-roblox_GM431946152.pdfIn PDF document text
    • https://www.ocic.hr/files/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • http://www.ocic.hr/files/hacking-community-roblox_GM431946152.pdfIn PDF document text
    • http://www.ocic.hr/files/free-old-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://www.ocic.hr/files/roblox-free-rixy-accowt-live_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002ee4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EE4 22184 bytes
SHA-256: d17ae7a826b5175b6b61f1702c1bf6e0f156f884b98e42019bd02121521e43d6
font_01_sfnt_off00006027.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6027 19536 bytes
SHA-256: 79214a24b664af52a262a75b87da172f391e051f7b7a22a375686560b0904378

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